diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 5ac1f4c..a930768 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -25,7 +25,7 @@ jobs:
       - name: Set up JDK
         uses: actions/setup-java@v4
         with:
-          java-version: "11"
+          java-version: "21"
           distribution: "zulu"
 
       - name: Validate Gradle wrapper
diff --git a/buildSrc/src/main/kotlin/buildsrc/conventions/lang/kotlin-multiplatform-base.gradle.kts b/buildSrc/src/main/kotlin/buildsrc/conventions/lang/kotlin-multiplatform-base.gradle.kts
index 3ceabc1..fe024b9 100644
--- a/buildSrc/src/main/kotlin/buildsrc/conventions/lang/kotlin-multiplatform-base.gradle.kts
+++ b/buildSrc/src/main/kotlin/buildsrc/conventions/lang/kotlin-multiplatform-base.gradle.kts
@@ -24,7 +24,9 @@ plugins {
 }
 
 kotlin {
-    //jvmToolchain(11)
+    jvmToolchain {
+        languageVersion.set(JavaLanguageVersion.of(8))
+    }
 
     applyDefaultHierarchyTemplate()